Fluid-pressure regulator



(No Model.)

stv-ANS. FLUID PRESSURE REGULATOR.

W: 55195..v llhfll-DPY.

t l T N WM uw view of the regulator.

UNTTED STATES PATENT OFFICE.

EVAN EVANS, OF CHICORA, PENNSYLVANIA.

FLUID-PRESSURE REGULATOR.

SPECIFICATION forming part of Letters Patent No. 504,973, datedSeptember 12, 1893..

' Application filed December 2l. 1892. Serial No. 455,900. (No model.)

To all whom t may concern:

Be it known that I, EVAN EVANS, of Chicora, 1n the county of Butler andState of Pennsyl- Vania, have invented certain new and usefulImprovements in Fluid-Pressure Regulators; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use the same, reference being had to the accompa-nylngdrawings,which form part of this specificatlon.

l\ [y invention relates to an improvement in iuid pressure regulators;and it consists in the novel combination andarrangement of parts whichwill be fully described hereinafter, and more especially referred Ato inthe claims hereto annexed.

The object of my invention is to provide an improved regulator forgoverning the flow of either oil or gas to a furnace beneath a boilerwhlch shall be operated automatically by the steam pressure within theboiler.

Referring to the accompanying drawings,- Figure l, is an elevation of asteam boiler and furnace having my improved regulator applied thereto.Fig. 2, is a vertical sectional Fig. 3, is a detached vlew of theinternal parts.

The regulator is adapted to be placed on the plpe supplying oil or gasto the furnace so that the fluid must of necessity pass through theregulator.

A, designates the fluid inlet chamber while immediately above it is thechamber B, of increased size from which the fluid passes to the furnace.A shoulder C, is thus formed between the chambers A, and B, upon whichrests the removable valve seat D flanged on lts opposite sides as shownat D and held in place by screws D2. Several of these seats may beprovided for each regulator having central openings or passages whichvary in size so as to govern the rapidity with which the uid is fed tothe burner, thus making it possible for the same regulator to govern thesupply of fluid to either a two or a ten horse power furnace. The upperend of the discharge chamber B, is shouldered as at B', and adapted torest on this shoulder is the counter sunk gasket E, in which rests thepressure plate F, secured to the upper end of a vertically movable rodG, the former being held in position by the nut G', on saidl rod.Secured to said rod immediately beneath gasket F, is the valve H, whichconsists ot' an upwardly recessed disk, the cavity thus formed in saiddisk being filled with a packing material L-pret'erably rubber.

Depending from the chamber A, is the well J, and situated therein is thetube K, which is slotted transversely at its lower end as shown at K.Encircling the tube is the coiled spring L, which is secured at itsupper end to the end of the tube while having its lower end connected tothe transverse bar M, extending through the tube and the slots K. Theupper end of the spring is coiled spirally as shown so that its diameterat this point is less than tube K thereby supporting it uponthe upperend of the tube in such a way as to prevent other than an expansivedownward Inovement on the latter. The spring is normally contracted sothat a downward push on said bar will expand the spring and thus createa pressure against the tension of the latter. The lower end of the rodG, extends into the tube K, and rests on bar M, and the device is soregulated as to hold the valve H, normally raised from its seat D. Thetube K, rests on a head N, which latter is vertically adjustable by thescrew O, depending from the lower end of the regulator and by this meansthe pressure of the spring upon the valve rod may be regulated.

Removably secured to the upper end of chamber B, is the cap P, underwhich steam is admitted through an opening P in its top from a suitableconnection with the steam boiler.

Between the cap P, and the chamber B, is

arranged the flexible diaphragm Q, which may be of rubber or any othersuitable material, and which is adapted to bear against the pressureplate F. The diaphragm is of such formation as to prevent the passage ofsteam therethrough to the chamber A.

In operation the fluid being fed to the furnace is allowed to pass fromchamber A, through chamber B, to the burner as the valve is heldnormally raised from its seat by the spring L, thus leaving the passagethrough the seat D, uninterrupted. When the steam pressure in the boilerhas become sufficiently IOO great to overcome the strength of spring L,the rod G, is forced downward by the pressure of the diaphragm ou plateF, thus forcing the valve II, to its seat and stopping the iiow of oilor gas to the burner until the steam pressure has become sutticientlyreduced to yield to the pressure of spring L, when the passage throughthe regulator will again be open and Huid allowed to pass to the burnerfor consumption. It is apparent that the spring L, may be so formed thatit, in connection with the set screw O, renders a very accurateadjustment of the regulator possible. The spring is preferably formed ofsteel wire which is square in cross section. The packing material in thevalve H, seals the passage in the seat D, when the valve is restingthereon while at the same time the flanged edge of the latter is notsubjected to the wear of a metallic surface as it would be were thevalve to rest directlythereon without the interposition of an elasticmaterial.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. An improved fluid pressure regulator comprising an inlet and anoutlet chamber,a rod movable vertically therein, a valve on the rodbetween the chambers, a tube through which the lower end of the rodextends, a spring coiled about the tube to which it is secured, aconnection between the lower ends 0f the rod and spring whereby theformer is held normally in an elevated position, and a means forapplying steam pressure to the upper end of the rod, substantially asshown and described.

2. A uid pressure regulator comprising an inlet and an outlet chamber, arod extending therethrough, a valve on said rod arranged between thechambers, a tube slotted transversely at its lower end and through whichtube the said rod extends, a spiral spring surrounding the said tube towhich it is secured at its upper end, a transverse bar extending throughthe slots of the tube and to'which the lower end ot' the spring issecured, and a means for applying steam pressure to the upper end of therod, substantially as shown and described.

3. A iiuid pressure regulator comprising an inlet and an outlet chamber,a vertically movable spring actuated rod extending therethrough, a valveon said rod arranged between the chambers, a removable countersunkgasket at the upper end of the outlet chamber, a pressure plate on theupper end of the rod for which the said gasket forms a seat, a removablecap for the regulator having a steam connection, and a Iiexiblediaphragm between the cap and said pressure plate, substantially asshown and described.

4. A fluid pressure regulator having an inlet and a discharge chamber, avertically movable rod, a valve between its ends for closing the passagebetween the chambers, a means

